Arc trainer



FIG. 1 is a rear, left side perspective view with the control panel shown in phantom;

FIG. 2 is a rear elevational view;

FIG. 3 is a front elevational view;

FIG. 4 is a left side elevational view, the right side being a mirror image thereof; and,

FIG. 5 is a top plan view.

The broken line showing of the control panel is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

We claim the ornamental design for the arc trainer, as shown. 